Add admin APIs for managing automation platform apps

[seratch]

This pull request adds a few newly added APIs for managing automation platform apps. Refer to https://api.slack.com/admins/workflow-permissions for details.

Category (place an x in each of the [ ])

• [ ] bolt (Bolt for Java)
• [ ] bolt-{sub modules} (Bolt for Java - optional modules)
• [x] slack-api-client (Slack API Clients)
• [x] slack-api-model (Slack API Data Models)
• [ ] *slack-api--kotlin-extension** (Kotlin Extensions for Slack API Clients)
• [ ] slack-app-backend (The primitive layer of Bolt for Java)

Requirements

Please read the Contributing guidelines and Code of Conduct before creating this issue or pull request. By submitting, you agree to those rules.

[codecov[bot]]

Codecov Report

Merging #1203 (fa732d1) into main (f0f0812) will decrease coverage by 0.48%. The diff coverage is 52.54%.

@@             Coverage Diff              @@
##               main    #1203      +/-   ##
============================================
- Coverage     75.11%   74.64%   -0.48%     
- Complexity     4016     4064      +48     
============================================
  Files           434      436       +2     
  Lines         12604    12835     +231     
  Branches       1261     1301      +40     
============================================
+ Hits           9468     9581     +113     
- Misses         2384     2489     +105     
- Partials        752      765      +13     

Files Changed	Coverage Δ
.../java/com/slack/api/methods/MethodsRateLimits.java	99.06% <ø> (ø)
...til/json/GsonAppWorkflowStepInputValueFactory.java	12.50% <12.50%> (ø)
...n/GsonAppWorkflowStepInputValueDefaultFactory.java	19.51% <19.51%> (ø)
.../com/slack/api/methods/impl/MethodsClientImpl.java	82.71% <50.00%> (-0.89%)	:arrow_down:
...java/com/slack/api/methods/RequestFormBuilder.java	87.20% <84.21%> (-0.15%)	:arrow_down:
...slack/api/methods/impl/AsyncMethodsClientImpl.java	92.67% <100.00%> (+0.35%)	:arrow_up:
...main/java/com/slack/api/util/json/GsonFactory.java	94.23% <100.00%> (+0.75%)	:arrow_up:

... and 2 files with indirect coverage changes

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