chore: Bump to latest rust version 1.94 and publish beta tags from feature branch

[gk-kindred]

This PR introduces below changes

1. Bump rust version to 1.94

We have been on very old rust version for a long time (1.75). This leads to issues at the time of publishing due transient packages have MSRV 1.80+.

The following commits covers the changes related to this part.
7985e3a, dcde9a0, 5391c0d

dcde9a0 is to fix the lint change introduced in the newer versions of rust.

2. Make it easy to publish beta tags from feature branches.

Current workflow

• master

  • current version - 0.3.14
  • Run release script
  • Bump version and tag to - 0.3.15 for publish
  • Create a new version 0.3.16-dev

• feature branch currently:-

  • Try bumping version to 0.3.16-beta, fails at publishing at cargo publish step.
  • Run release script is forced to
  • publish 0.3.17 with tag from feature branch
  • create a new -dev version 0.3.18-dev
  • Merging the feature branch back to master
  • shows the 2 commits related to version bump and updates the versions on master

Proposed solution

• master
  • current version - 0.3.14
  • Run release script to bump version and tag to 0.3.15 for publish

-feature branch proposed

• Tag a commit with -beta version. eg. 0.3.16-beta.0
• Push the commits and tag
• Github action detects the tag, and runs the publish action
• For beta tags, bump the versions in package.json and cargo.toml
• This leaves dirty changes on the github runner but not commited.
• Publish the packages under 0.3.16-beta.0
• The feature branch doesn't have these changes/commits and therefore when merging this branch to master, we don't see 0.3.16-beta.0 in the master branch. Keeping the versions and commits clean at the same time make it flexible and easy to publish -beta tags from feature to test a feature/change.

An advantage with the proposed solution is we don't bump too many unwanted versions from feature branch just to test a feature.

3. Fix code coverage github action and capture codecoverage

Code coverage was silently broken for sometime. Bumping to rust version 1.94 had minor changes around the code coverage, which is fixed and improved.

[codecov]

Codecov Report

❌ Patch coverage is 36.36364% with 7 lines in your changes missing coverage. Please review.
✅ Project coverage is 66.30%. Comparing base (bc281df) to head (c0a2da7).
⚠️ Report is 242 commits behind head on master.

Files with missing lines	Patch %	Lines
packages/cohort_banking/src/bin/preload_db.rs	0.00%	2 Missing ⚠️
...s/examples_support/src/load_generator/generator.rs	0.00%	2 Missing ⚠️
packages/cohort_banking/src/metrics.rs	0.00%	1 Missing ⚠️
packages/talos_certifier/src/healthcheck.rs	0.00%	1 Missing ⚠️
.../src/bin/histogram_decision_timeline_from_kafka.rs	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #154      +/-   ##
==========================================
+ Coverage   56.95%   66.30%   +9.34%     
==========================================
  Files         113      123      +10     
  Lines        5708    12149    +6441     
==========================================
+ Hits         3251     8055    +4804     
- Misses       2457     4094    +1637     

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