Remove RestoreLockedMode and lock files

[bernardnormier]

This PR removes RestoreLockedMode and the associated lock files on main.

We should enable this feature when we release - but not on the main development branch.

[Copilot]

Pull request overview

This PR disables NuGet “locked restore” on the main development branch by removing the MSBuild properties that enforced lock files, and deletes the existing packages.lock.json files from src and tests.

Changes:

• Remove RestorePackagesWithLockFile and RestoreLockedMode from src/Directory.Build.props and tests/Directory.Build.props.
• Delete all committed packages.lock.json files under src/** and tests/**.

Reviewed changes

Copilot reviewed 45 out of 45 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
tests/ZeroC.Slice.Tests/packages.lock.json	Remove NuGet lock file from test project
tests/ZeroC.Slice.Tests.ReferencedAssemblies/DPrime/packages.lock.json	Remove NuGet lock file from referenced-assemblies test project
tests/ZeroC.Slice.Tests.ReferencedAssemblies/D/packages.lock.json	Remove NuGet lock file from referenced-assemblies test project
tests/ZeroC.Slice.Tests.ReferencedAssemblies/C/packages.lock.json	Remove NuGet lock file from referenced-assemblies test project
tests/ZeroC.Slice.Tests.ReferencedAssemblies/B/packages.lock.json	Remove NuGet lock file from referenced-assemblies test project
tests/ZeroC.Slice.Tests.ReferencedAssemblies/A/packages.lock.json	Remove NuGet lock file from referenced-assemblies test project
tests/IntegrationTests/packages.lock.json	Remove NuGet lock file from integration tests
tests/IceRpc.Tests/packages.lock.json	Remove NuGet lock file from test project
tests/IceRpc.Tests.Common/packages.lock.json	Remove NuGet lock file from shared test utilities project
tests/IceRpc.Telemetry.Tests/packages.lock.json	Remove NuGet lock file from telemetry tests
tests/IceRpc.Slice.Tests/packages.lock.json	Remove NuGet lock file from Slice tests
tests/IceRpc.Retry.Tests/packages.lock.json	Remove NuGet lock file from retry tests
tests/IceRpc.RequestContext.Tests/packages.lock.json	Remove NuGet lock file from request-context tests
tests/IceRpc.Quic.Tests/packages.lock.json	Remove NuGet lock file from QUIC tests
tests/IceRpc.Protobuf.Tests/packages.lock.json	Remove NuGet lock file from protobuf tests
tests/IceRpc.Metrics.Tests/packages.lock.json	Remove NuGet lock file from metrics tests
tests/IceRpc.Logger.Tests/packages.lock.json	Remove NuGet lock file from logger tests
tests/IceRpc.Locator.Tests/packages.lock.json	Remove NuGet lock file from locator tests
tests/IceRpc.Extensions.DependencyInjection.Tests/packages.lock.json	Remove NuGet lock file from DI extension tests
tests/IceRpc.Conformance.Tests/packages.lock.json	Remove NuGet lock file from conformance tests
tests/IceRpc.Compressor.Tests/packages.lock.json	Remove NuGet lock file from compressor tests
tests/Directory.Build.props	Stop enforcing lock files / locked restore for test builds
src/ZeroC.Slice/packages.lock.json	Remove NuGet lock file from library project
src/IceRpc/packages.lock.json	Remove NuGet lock file from library project
src/IceRpc.Transports.Coloc/packages.lock.json	Remove NuGet lock file from library project
src/IceRpc.Telemetry/packages.lock.json	Remove NuGet lock file from library project
src/IceRpc.SliceBuildTelemetry.Reporter/packages.lock.json	Remove NuGet lock file from tool project
src/IceRpc.Slice/packages.lock.json	Remove NuGet lock file from library project
src/IceRpc.Slice.Tools/packages.lock.json	Remove NuGet lock file from tool project
src/IceRpc.Slice.Generators/packages.lock.json	Remove NuGet lock file from generator project
src/IceRpc.Retry/packages.lock.json	Remove NuGet lock file from library project
src/IceRpc.RequestContext/packages.lock.json	Remove NuGet lock file from library project
src/IceRpc.ProtocGen/packages.lock.json	Remove NuGet lock file from tool project
src/IceRpc.ProtocGen.BuildTelemetry/packages.lock.json	Remove NuGet lock file from tool project
src/IceRpc.Protobuf/packages.lock.json	Remove NuGet lock file from library project
src/IceRpc.Protobuf.Tools/packages.lock.json	Remove NuGet lock file from tool project
src/IceRpc.Protobuf.Generators/packages.lock.json	Remove NuGet lock file from generator project
src/IceRpc.Metrics/packages.lock.json	Remove NuGet lock file from library project
src/IceRpc.Logger/packages.lock.json	Remove NuGet lock file from library project
src/IceRpc.Locator/packages.lock.json	Remove NuGet lock file from library project
src/IceRpc.Extensions.DependencyInjection/packages.lock.json	Remove NuGet lock file from library project
src/IceRpc.Deadline/packages.lock.json	Remove NuGet lock file from library project
src/IceRpc.Compressor/packages.lock.json	Remove NuGet lock file from library project
src/Directory.Build.props	Stop enforcing lock files / locked restore for src builds

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