fix: fix test-all-versions script

[david-luna]

Which problem is this PR solving?

The PR adding the new test workflow passed but had some issues:

• not all packages were tested. Like pg
• some other missed the coverage merge task which combines all the tests results per package.

Now we are having TAV failures in PRs like #3013. Is not for the missing script but it seems nx is providing a different context than npm run --workspaces

The following command

npx nx run-many --parallel=false -t test-all-versions -p @opentelemetry/instrumentation-pg

fails giving different messages, the most common is

      -- required packages ["pg-pool@^3","[email protected]"]
      -- installing ["pg-pool@^3","[email protected]"]
      -- running test "npm run test" with pg (env: {})
      
      > @opentelemetry/[email protected] test
      > nyc --no-clean mocha 'test/**/*.test.ts'
      
      
       Exception during run: Error: Cannot find module 'pg'
      Require stack:
      - /Users/david/Documents/repos/otel/opentelemetry-js-contrib/node_modules/pg-pool/index.js
      - /Users/david/Documents/repos/otel/opentelemetry-js-contrib/packages/instrumentation-pg/test/pg-pool.test.ts
      - /Users/david/Documents/repos/otel/opentelemetry-js-contrib/node_modules/mocha/lib/nodejs/esm-utils.js
      - /Users/david/Documents/repos/otel/opentelemetry-js-contrib/node_modules/mocha/lib/mocha.js
      - /Users/david/Documents/repos/otel/op

But the following command succeds

npm run --if-present test-all-versions:with-services-env -w @opentelemetry/instrumentation-pg

Is just a guess but maybe nx is also modifying the node_modules tree and affecting installations of the packages from test-all-versions.

Short description of the changes

• add a script to calculate affected packages
• use the output to run the test script in series
• add missing merge coverage script in packages that need it

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 91.44%. Comparing base (2300dc1) to head (3bc5538).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3017      +/-   ##
==========================================
+ Coverage   90.54%   91.44%   +0.89%     
==========================================
  Files         112      146      +34     
  Lines        6083     8192    +2109     
  Branches     1349     1846     +497     
==========================================
+ Hits         5508     7491    +1983     
- Misses        575      701     +126     

Flag	Coverage Δ
instrumentation-aws-sdk	86.48% <ø> (?)
instrumentation-cucumber	92.72% <ø> (?)
instrumentation-ioredis	91.08% <ø> (?)
instrumentation-mongoose	90.74% <ø> (?)
instrumentation-pg	95.95% <ø> (?)
instrumentation-redis	85.26% <ø> (?)
instrumentation-winston	79.60% <ø> (+50.74%)	⬆️

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see 35 files with indirect coverage changes

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[Ugzuzg]

nx sets process.env.npm_config_legacy_peer_deps = true, which messes with installation in tav. I had to unset it in the tav patch to make everything work. Could also affect regular tav installs.

[trentm]

nit:

Suggested change

	"test-all-versions": "tav",
	"test-all-versions": "tav",