PMM-14887 Restructure project makefiles

[ademidoff]

https://jira.percona.com/browse/PMM-14887

• PMM-14887 Restructure Makefiles percona/pmm#5212

[JNKPercona]

Server docker: perconalab/pmm-server-fb:PR-4291-c0abe9c
Client docker: perconalab/pmm-client-fb:PR-4291-c0abe9c
Watchtower docker: perconalab/pmm-watchtower-fb:PR-4291-c0abe9c
Client tarball: https://s3.us-east-2.amazonaws.com/pmm-build-cache/PR-BUILDS/pmm-client/pmm-client-PR-4291-c0abe9c.tar.gz
Staging instance: https://pmm.cd.percona.com/job/pmm3-aws-staging-start/parambuild/?DOCKER_VERSION=perconalab/pmm-server-fb:PR-4291-c0abe9c&CLIENT_VERSION=https://s3.us-east-2.amazonaws.com/pmm-build-cache/PR-BUILDS/pmm-client/pmm-client-PR-4291-c0abe9c.tar.gz

[JNKPercona]

API tests have failed: https://pmm.cd.percona.com/job/pmm3-api-tests/5720/

[JNKPercona]

Server docker: perconalab/pmm-server-fb:PR-4291-9b4cfb8
Client docker: perconalab/pmm-client-fb:PR-4291-9b4cfb8
Watchtower docker: perconalab/pmm-watchtower-fb:PR-4291-9b4cfb8
Client tarball: https://s3.us-east-2.amazonaws.com/pmm-build-cache/PR-BUILDS/pmm-client/pmm-client-PR-4291-9b4cfb8.tar.gz
Staging instance: https://pmm.cd.percona.com/job/pmm3-aws-staging-start/parambuild/?DOCKER_VERSION=perconalab/pmm-server-fb:PR-4291-9b4cfb8&CLIENT_VERSION=https://s3.us-east-2.amazonaws.com/pmm-build-cache/PR-BUILDS/pmm-client/pmm-client-PR-4291-9b4cfb8.tar.gz

[JNKPercona]

API tests have failed: https://pmm.cd.percona.com/job/pmm3-api-tests/5721/