fix(database)!: remove cloudwatchLogsExportConfiguration

[wotolom]

Description of your changes

subject database.RDSInstance:

• Breaking API change: remove field cloudwatchLogsExportConfiguration (CloudwatchLogsExportConfiguration is a specific parameter for the ModifyDBInstance call, that overlapped with EnableCloudwatchLogsExports, which is used in CreateDBInstance)
• add status field atProvider.enabledCloudwatchLogsExports
• add logic to isUpToDate and Update/GenerateModifyDBInstanceInput (as also used in DocDB.DBCluster controller for the same parameters)
• remove EnableCloudwatchLogsExports lateinit (to allow user to disable all again with empty string; is AWS default)
• update tests

(Fixes #1795 regarding my comment there)

Breaking change ToDos/notes for users:

• claims using cloudwatchLogsExportConfiguration need to instead use enableCloudwatchLogsExports

I have:

• Read and followed Crossplane's [contribution process].
• Run make reviewable test to ensure this PR is ready for review.

How has this code been tested

Manually

[MisterMX]

LGTM. I think it makes sense to not have redundant spec properties. Thank you very much for your contribution @wotolom!