…se columns

…ted lowercase columns (DSsatwareAG)

This PR was squashed before being merged into the 6.4 branch.

Discussion
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[Messenger] Firebird Database - incompatibility with expected lowercase columns

Firebird Database -  incompatibility with expected lowercase columns

| Q             | A
| ------------- | ---
| Branch?       | 6.4
| Bug fix?      | yes
| New feature?  | no
| Deprecations? | no
| Issues        | Fix #61171
| License       | MIT

Fix ensures, for Firebird databases, the column names are consistently converted to lowercase before being processed by Doctrine Messenger. This resolves the incompatibility by providing Messenger with the expected lowercase column names, regardless of how Firebird returns them.

Because the FirebirdPlatform is not part of the doctrine/dbal package, I was unable to use instanceof for platform detection. Instead, I implemented a string comparison to check for Firebird as the database platform.

Commits
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6223362e4f5 [Messenger] Firebird Database - incompatibility with expected lowercase columns

* 6.4:
  [Cache] Fix internal representation of non-static values
  [Cache] Make `TagAwareAdapter` registrable as a service
  refactor: Unify & more humane translation message
  fix Resources translations validators.pt.xlf
  [Security] Pass attributes to nested `ChainUserProviders`
  [Validator] Update translation for the Video constraint
  [Messenger] Firebird Database - incompatibility with expected lowercase columns
  SQLSRV: Change column type from TEXT to STRING
  Fix exception catch when deleting temporary table in the sameDatabaseChecker
  [Serializer] Fix serializer crash due to asymmetric visibility on `protected(set)` properties

…al usages

* 6.4:
  Replace __sleep/wakeup() by __(un)serialize() for throwing and internal usages