direct: add FieldTriggers(); remove ClassifyChanges(), RecreateFields()

[denik]

Changes

New method FieldTriggers(), which is a more powerful version of RecreateFields() that allows associate any action with a field.

Builds on top of #3585

Why

This covers existing classification use cases without custom code.

We might still need ClassifyChange function in the future, but exact types involved will likely change by that time (with regard to serialized plan work).

Tests

Existing tests.

[eng-dev-ecosystem-bot]

Run: 17651253066

	Env	✅​pass	❌​FAIL	🔄​flaky	🙈​skip
🔄​	aws linux	309		3	526
✅​	aws windows	313			525
❌​	aws-ucws linux	422	2		424
❌​	aws-ucws windows	423	2		423
✅​	azure linux	312			525
✅​	azure windows	313			524
❌​	azure-ucws linux	422	2		423
❌​	azure-ucws windows	423	2		422
✅​	gcp linux	311			527
✅​	gcp windows	312			526

Test Name	aws linux	aws-ucws linux	aws-ucws windows	azure-ucws linux	azure-ucws windows
TestAccept	🔄​flaky	❌​FAIL	❌​FAIL	❌​FAIL	❌​FAIL
TestAccept/bundle/deploy/lakebase/synced-database-table	🙈​skip	❌​FAIL	❌​FAIL	❌​FAIL	❌​FAIL
TestAccept/bundle/templates/default-python/integration_classic	🔄​flaky	✅​pass	✅​pass	✅​pass	✅​pass
TestAccept/bundle/templates/default-python/integration_classic/DATABRICKS_CLI_DEPLOYMENT=terraform/UV_PYTHON=3.9	🔄​flaky	✅​pass	✅​pass	✅​pass	✅​pass