Update dependency catchorg/Catch2 to v3.15.3

[renovate]

This PR contains the following updates:

Package	Update	Change
catchorg/Catch2	patch	3.15.2 → 3.15.3

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Release Notes

catchorg/Catch2 (catchorg/Catch2)

v3.15.3

Compare Source

Fixes

• The JSON reporter's number handling is locale-independent. (#​3176)
• Removed leftover debug message from catch_discover_tests (#​3177)
• Fixed typo in the "Could not jump to the Nth element" exception message (#​3181)

Improvements

• catch_discover_tests registers tests in deterministic (alphabetical) order.
• catch_discover_tests has been rewritten to be massively faster.
  • Preparing the actual CTest script is significantly faster.
  • Parsing the JSON test array is significantly faster.
  • Running without ADD_TAGS_AS_LABELS set is 10-15% faster (as opposed to being the same speed) (#​3169)
  • The new implementation is about 4x-5x faster, so registering 500 tests now takes ~350ms (down from 1.1s).
• JSON writing is faster
  • Small improvement in writing non-string values
  • ~6-40% improvement in writing string values that do not need escaping
  • ~1-6% improvement in writing string values that do need escaping
• Better support for infs and NaNs in JSON output

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