fix(propagator-jaeger): zero pad extracted trace id to 32 characters

[sid-maddy]

Which problem is this PR solving?

Fixes #1983

Short description of the changes

Ensures the Jaeger propagator context extraction conforms to the Jaeger trace context specification. Specifically, when received trace id shorter that 32 characters, it will now be zero-padded to 32 characters.

[linux-foundation-easycla]

The committers are authorized under a signed CLA.

• ✅ Daniel Dyla (b2e7530, ec509ab, b80dfb7, 634f62f, 83f58ed, cffd774, 0ea3483, f8188b7, 8749da6, 53baaa6, a446fdd, f6c9ef7, 81c284d, 58bf181, 4a5e930, 86237f6, 4dd4427)
• ✅ Mayur Kale (9c6b763)
• ✅ legendecas (8095ea4)
• ✅ WhiteSource Renovate (7477a58, 03b972e, 46c2524, 66fc91b, d2f7183, 45a1d8d, db37811, 3667f40, 7881455, 3b37d44, 1226d76, a5209fd, 4a0ecfc, 798654d, ec9c03a, c13d0f6, bddabd3)
• ✅ rezakrimi (1500133, 93f500b, ae7e05f, ecf58a5)
• ✅ Julien Fabre (5d8e043)
• ✅ Bartlomiej Obecny (9461bab, 6a0f205, 20b8637)
• ✅ Jakub Malinowski (f9f89b8, 41cd3be)
• ✅ Gerhard Stöbich (ae43b3a, 497aaaf, 3715f85, 12bed32)
• ✅ Valentin Marchaud (e00134e)
• ✅ Siddhesh Mhadnak (7d543ce, 540b5ec)

[codecov]

Codecov Report

Merging #1986 (9cce712) into main (8e2e2a9) will increase coverage by 0.00%.
The diff coverage is 100.00%.

❗ Current head 9cce712 differs from pull request most recent head ce54776. Consider uploading reports for the commit ce54776 to get more accurate results

@@           Coverage Diff           @@
##             main    #1986   +/-   ##
=======================================
  Coverage   93.05%   93.05%           
=======================================
  Files         154      154           
  Lines        5975     5976    +1     
  Branches     1246     1246           
=======================================
+ Hits         5560     5561    +1     
  Misses        415      415           

Impacted Files	Coverage Δ
...propagator-jaeger/src/JaegerHttpTracePropagator.ts	100.00% <100.00%> (ø)

[dyladan]

Sorry this slipped through the cracks and it's been so long to get reviews. Implementation looks good but I think the test isn't actually testing your change.

[obecny]

FYI padStart is not supported in IE 11 but luckily from what I checked the support has been already dropped My Microsoft Team in last year and on 13th of April (very soon) Windows 10 will get Edge as security update. End of IE11 - small thing to celebrate :)