[10.x] Fix issue with table prefix duplication in DatabaseTruncation trait

[mobidev86]

This pull request addresses the issue documented in #48264
where the DatabaseTruncation trait would attempt to truncate a table with a prefix being applied twice when using a DB connection configured to prefix all tables.

Changes Made:

• Added a new function removeTablePrefix to remove the table prefix from a table name if it exists.
• Modified the truncateTablesForConnection method to utilize removeTablePrefix when checking for table existence and performing truncation.

Steps to Reproduce:

• More details has been provided in the issue itself

Expected Outcome:

• With this pull request, tests should pass successfully, and the issue with table prefix duplication should be resolved.

Additional Context:

• This change ensures that the table prefix is correctly handled when checking for table existence and performing truncation, preventing the issue where the prefix was applied twice.

Testing:

• I have tested this fix with the steps mentioned in the "Steps to Reproduce" section and confirmed that the tests now pass as expected.