migrate 7.x-2.12

This release is a maintenance release including PHP 7.3, 7.4, 8.0, 8.1 and 8.2 compatibility fixes and other bug fixes.

#3327043: PHP 8: Deprecated function: Implicit conversion from float to int loses precision
#3253653: [PHP 8.0] ArgumentCountError: Too few arguments to function MigrationBase::errorHandler(), 4 passed and exactly 5 expected in MigrationBase->errorHandler()
#3301821: Fix PHP 8.1 compatibility issues
#3272530: PHP 8.0 compatibility Issue: migrate_ui_batch() arguments
#3111620: sourceMigration does not accept zero as DefaultValue
#2957540: Undefined index: message in entity.inc, line 205
#3097408: UTF-8 support: Add CharacterSet for MS SQL connection (sqlsrv.inc)
#3100013: Fix custom port for MS SQL connection (sqlsrv.inc)
#3069353: After migration display messages with correct level instead of default level 'error'.
#2636864: Migrate checks handlesType too frequently
#2769217: Migrated empty field malformed (field label shown)
#2685773: MigrateSQLMap uses print directly and breaks batch processing
#2450425: highwater field cannot be an aggregate function
#2757501: File URL's with query string do not get migrated correctly
#2599200: Drush background operations check fails on Acquia Cloud
#392434: Default audit Views
#2709113: MigrateFile: do not encode @ in urlencode() function
#2701095: Active URL losing reference for JSON source class
#2782331: getLastImported() takes too long
#2782463: Drush migrate import with flag "needs-update" import all records
#2846496: Follow up for #2021973
#3027630: PHP 7.2: count() on non-Countable in MigrateItemJSON::constructItemUrl()
#3045879: Refactor - decouple migrate import code so other modules can overrride it
#2873200: Allow override of subfield delimiter
#3028488: Migrate module does not reset the static module_implements cache after end of Process
#3003164: Support forum taxonomy terms
#3020473: Ignore migration of empty terms in case of multiple terms being migrated
#2996693: Fix warnings generated from sqlsrv.inc
#2928784: Remove usage of mssql functions, they were removed in PHP 7.0
#2770093: computeCount() incorrect for headers that include embedded newlines
#2588341: Migration::applyMappings() problem with handle multifield subfields