[Accton][wedge800bact] Add PLATFORM_WEDGE800BACT to ProdConfigFactory

[brandonchen-accton]

Summary

PLATFORM_WEDGE800BACT (platformType 41) was missing from the test utility functions in ProdConfigFactory.cpp. This caused HwProdInvariantsFswStrictPriorityTest.verifyInvariants to throw an exception in the sai_test-sai_impl with: "provided PlatformType: 41 has not been defined for uplinksCountFromSwitch"

PLATFORM_WEDGE800BACT has 16 uplinks when operating at 800G, so we added the corresponding definition to fix the test failure.

Pre-submission checklist

• I've ran the linters locally and fixed lint errors related to the files I modified in this PR. You can install the linters by running pip install -r requirements-dev.txt && pre-commit install
• pre-commit run

clang-format.............................................................Passed
shellcheck...........................................(no files to check)Skipped
shfmt................................................(no files to check)Skipped
trim trailing whitespace.................................................Passed
fix end of files.........................................................Passed
check yaml...........................................(no files to check)Skipped
check json...........................................(no files to check)Skipped
check for merge conflicts................................................Passed
ruff check...........................................(no files to check)Skipped
ruff format..........................................(no files to check)Skipped

Test Plan

[       OK ] HwProdInvariantsFswStrictPriorityTest.verifyInvariants (42435 ms)
[----------] 1 test from HwProdInvariantsFswStrictPriorityTest (42435 ms total)

[----------] Global test environment tear-down
[==========] 1 test from 1 test suite ran. (42435 ms total)
[  PASSED  ] 1 test.