feat(logs): alert_definitins, policy order and dashboard fix

[kavya498]

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Along with new resources support this PR also fixes #6518

Output from acceptance testing:

=== RUN   TestAccIbmLogsAlertDefinitionDataSourceBasic
--- PASS: TestAccIbmLogsAlertDefinitionDataSourceBasic (24.43s)
=== RUN   TestAccIbmLogsAlertDefinitionsDataSourceBasic
--- PASS: TestAccIbmLogsAlertDefinitionsDataSourceBasic (22.75s)
=== RUN   TestAccIbmLogsAlertDefinitionBasic
--- PASS: TestAccIbmLogsAlertDefinitionBasic (33.01s)
...