test: decoder_prometheus: add Fluent Bit issue test #9267

[edsiper]

valgrind ./tests/cmt-test-prometheus_parser issue_fluent_bit_9267
==260375== Memcheck, a memory error detector
==260375== Copyright (C) 2002-2022, and GNU GPL'd, by Julian Seward et al.
==260375== Using Valgrind-3.22.0 and LibVEX; rerun with -h for copyright info
==260375== Command: ./tests/cmt-test-prometheus_parser issue_fluent_bit_9267
==260375==
Test issue_fluent_bit_9267...                   ==260375== Invalid free() / delete / delete[] / realloc()
==260375==    at 0x484988F: free (in /usr/libexec/valgrind/vgpreload_memcheck-amd64-linux.so)
==260375==    by 0x12E9DC: reset_context (in /home/edsiper/c/cmetrics/build/tests/cmt-test-prometheus_parser)
==260375==    by 0x12EFD0: finish_metric (in /home/edsiper/c/cmetrics/build/tests/cmt-test-prometheus_parser)
==260375==    by 0x12E229: cmt_decode_prometheus_parse (in /home/edsiper/c/cmetrics/build/tests/cmt-test-prometheus_parser)
==260375==    by 0x12DEAF: cmt_decode_prometheus_create (in /home/edsiper/c/cmetrics/build/tests/cmt-test-prometheus_parser)
==260375==    by 0x121FB8: test_issue_fluent_bit_9267 (in /home/edsiper/c/cmetrics/build/tests/cmt-test-prometheus_parser)
==260375==    by 0x122647: acutest_do_run_ (in /home/edsiper/c/cmetrics/build/tests/cmt-test-prometheus_parser)
==260375==    by 0x11E850: main (in /home/edsiper/c/cmetrics/build/tests/cmt-test-prometheus_parser)
==260375==  Address 0x4a81dc4 is 4 bytes inside a block of size 7 alloc'd
==260375==    at 0x4846828: malloc (in /usr/libexec/valgrind/vgpreload_memcheck-amd64-linux.so)
==260375==    by 0x491F34E: strdup (strdup.c:42)
==260375==    by 0x12FFF1: parse_metric_name (in /home/edsiper/c/cmetrics/build/tests/cmt-test-prometheus_parser)
==260375==    by 0x12E401: cmt_decode_prometheus_parse (in /home/edsiper/c/cmetrics/build/tests/cmt-test-prometheus_parser)
==260375==    by 0x12DEAF: cmt_decode_prometheus_create (in /home/edsiper/c/cmetrics/build/tests/cmt-test-prometheus_parser)
==260375==    by 0x121FB8: test_issue_fluent_bit_9267 (in /home/edsiper/c/cmetrics/build/tests/cmt-test-prometheus_parser)
==260375==    by 0x122647: acutest_do_run_ (in /home/edsiper/c/cmetrics/build/tests/cmt-test-prometheus_parser)
==260375==    by 0x11E850: main (in /home/edsiper/c/cmetrics/build/tests/cmt-test-prometheus_parser)
==260375==
[ OK ]
SUCCESS: All unit tests have passed.

[edsiper]

note: CI aims to fail until the fix is in place

[edsiper]

re: fluent/fluent-bit#9267 / @leonardo-albertovich in this branch the test case is ready.