CFNV2: Add startup log message

[simonrw]

Motivation

When starting the new provider we want to make it obvious that it has loaded, as well as provide the user with how to proceed if there is an issue with the new provider.

Changes

Log a message on service startup including:

• how to fall back to the old provider
• how to submit a bug report with metadata so we can easily find it again

Testing

Check out this branch and start LocalStack with python -m localstack.dev.run. Then invoke awslocal cloudformation list-stacks and you should see the startup message presented.

[github-actions]

Test Results - Preflight, Unit

22 117 tests  ±0   20 379 ✅ ±0   6m 48s ⏱️ +24s
     1 suites ±0    1 738 💤 ±0 
     1 files   ±0        0 ❌ ±0 

Results for commit cd0d28c. ± Comparison against base commit 445c32f.

♻️ This comment has been updated with latest results.

[github-actions]

LocalStack Community integration with Pro

  2 files  ±    0    2 suites  ±0   21m 9s ⏱️ - 1h 21m 30s
555 tests  - 4 080  328 ✅  - 3 864  227 💤  - 216  0 ❌ ±0 
557 runs   - 4 080  328 ✅  - 3 864  229 💤  - 216  0 ❌ ±0 

Results for commit cd0d28c. ± Comparison against base commit 445c32f.

This pull request removes 4080 tests.

tests.aws.scenario.bookstore.test_bookstore.TestBookstoreApplication ‑ test_lambda_dynamodb
tests.aws.scenario.bookstore.test_bookstore.TestBookstoreApplication ‑ test_opensearch_crud
tests.aws.scenario.bookstore.test_bookstore.TestBookstoreApplication ‑ test_search_books
tests.aws.scenario.bookstore.test_bookstore.TestBookstoreApplication ‑ test_setup
tests.aws.scenario.kinesis_firehose.test_kinesis_firehose.TestKinesisFirehoseScenario ‑ test_kinesis_firehose_s3
tests.aws.scenario.lambda_destination.test_lambda_destination_scenario.TestLambdaDestinationScenario ‑ test_destination_sns
tests.aws.scenario.lambda_destination.test_lambda_destination_scenario.TestLambdaDestinationScenario ‑ test_infra
tests.aws.scenario.loan_broker.test_loan_broker.TestLoanBrokerScenario ‑ test_prefill_dynamodb_table
tests.aws.scenario.loan_broker.test_loan_broker.TestLoanBrokerScenario ‑ test_stepfunctions_input_recipient_list[step_function_input0-SUCCEEDED]
tests.aws.scenario.loan_broker.test_loan_broker.TestLoanBrokerScenario ‑ test_stepfunctions_input_recipient_list[step_function_input1-SUCCEEDED]
…

♻️ This comment has been updated with latest results.

[github-actions]

Test Results (amd64) - Acceptance

7 tests  ±0   5 ✅ ±0   3m 7s ⏱️ -3s
1 suites ±0   2 💤 ±0 
1 files   ±0   0 ❌ ±0 

Results for commit cd0d28c. ± Comparison against base commit 445c32f.

♻️ This comment has been updated with latest results.

[github-actions]

Test Results (amd64) - Integration, Bootstrap

  5 files    5 suites   33m 43s ⏱️
579 tests 353 ✅ 226 💤 0 ❌
585 runs  353 ✅ 232 💤 0 ❌

Results for commit cd0d28c.

♻️ This comment has been updated with latest results.