Update MP Config 3.1 API, TCK & SmallRye jars

[tevans78]

Update to final version of API and TCK jars.
Update to latest applicable version of SmallRye Config.

[tevans78]

#26702 only updated the API and TCK jars. Updating the SmallRye jars caused a TCK failure on Java 21 that needs investigation - #26767

[jakub-pomykala]

The protected modifier has been removed from the SmallRyeConfigBuilder.getDefaultSources() which means our Override of the method is now not working. Opened an issue and PR in the SmallRye-config repo

[jakub-pomykala]

Update reverted in #27455.

Due to:

1. InstantOn builds: ConfigEnv updates are not reflected after restore. MP Config checkpoint feature failing tests after SmallRye-config 3.5.2 update #27523
2. MP-config-1.3 Full FAT failing when looking up $$MPCONFIG_FATTEST_ENV_VARIABLE. (RTC 298683) MP Config 1.3 doesn't read "$$" properly causing test failures after SmallRye-config 3.5.2 update #27482

For 1: SmallRye are now creating more copies of ConfigEnvs in more locations (here) and we are trying to stop that in our implementation

[jakub-pomykala]

We have a fix for both issues but by implementing the fix for #27482 we have detected another issue where Environment Variables are matched even though there is no exact match in the .env files.