fix(plugin-workflow): fix designable of assign fields in create/update node

[mytharcher]

Description

Fix designable of assign fields in create/update node.

Steps to reproduce

1. Add an update node and configure some fields to assign values.
2. Trigger the workflow.
3. Review the node configuration of executed workflow.

Expected behavior

Assign values fields should not be designable after executed.

Actual behavior

Designable.

Related issues

None.

Reason

Designable logic.

Solution

Use nodeForm.disabled to calculate designable.

[github-actions]

Tests results for "E2E"

9 flaky

⚠️ [chromium] › plugins/@nocobase/plugin-action-bulk-edit/src/client/__e2e__/schemaSettings.test.ts:14:7 › bulk edit action setting › data will be updated && edit form configure
⚠️ [chromium] › plugins/@nocobase/plugin-action-duplicate/src/client/__e2e__/schemaInitailizer.test.ts:13:7 › TableActionColumnInitializers & DetailsActionInitializers & ReadPrettyFormActionInitializers should add duplication action › duplication action in TableActionColumnInitializers
⚠️ [chromium] › plugins/@nocobase/plugin-auth/src/client/__e2e__/auth.test.ts:21:7 › auth › register
⚠️ [chromium] › plugins/@nocobase/plugin-gantt/src/client/__e2e__/schemaSettings.test.ts:26:7 › configure params in gantt block › set data scope in gantt block
⚠️ [chromium] › core/client/src/modules/blocks/data-blocks/table/__e2e__/schemaSettings1.test.ts:65:9 › table block schema settings › enable drag and drop sorting › enable drag and drop sorting
⚠️ [chromium] › plugins/@nocobase/plugin-action-bulk-edit/src/client/__e2e__/schemaInitailizer.test.ts:14:7 › TableActionInitializers & GanttActionInitializers & MapActionInitializers should add bulk edit action › bulk edit in TableActionInitializers
⚠️ [chromium] › plugins/@nocobase/plugin-acl/src/client/__e2e__/configure.test.ts:13:5 › allows to configure interface
⚠️ [chromium] › plugins/@nocobase/plugin-action-bulk-update/src/client/__e2e__/schemaSettings.test.ts:14:7 › data will be updated && Assign field values && after successful submission › data will be updated && Assign field values && after successful submission
⚠️ [chromium] › plugins/@nocobase/plugin-workflow/src/client/__e2e__/conditionNode/continueWhenYesMathEngine.test.ts:281:5 › Collection event add data trigger, Math engine, determines that the trigger node integer field variable is not equal to an unequal constant, passes.

986 passed, 30 skipped
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