[typescript-resolvers] Fix resolversNonOptionalTypename for union members in mapper cases

[eddeee888]

Description

This PR fixes resolversNonOptionalTypename union member when used in mapper cases:

• mappers without placeholders
• mappers with placeholders
• default mappers without placeholders
• default mappers with placeholders

This also adds unit tests for these scenarios.

Type of change

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)

How Has This Been Tested?

• Unit tests

Checklist:

• I have followed the CONTRIBUTING doc and the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published in downstream modules

[changeset-bot]

🦋 Changeset detected

Latest commit: 6e6076d

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 9 packages

Name	Type
@graphql-codegen/visitor-plugin-common	Patch
@graphql-codegen/typescript-resolvers	Patch
@graphql-codegen/typescript-document-nodes	Patch
@graphql-codegen/gql-tag-operations	Patch
@graphql-codegen/typescript-operations	Patch
@graphql-codegen/typed-document-node	Patch
@graphql-codegen/typescript	Patch
@graphql-codegen/graphql-modules-preset	Patch
@graphql-codegen/client-preset	Patch

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🚀 Snapshot Release (alpha)

The latest changes of this PR are available as alpha on npm (based on the declared changesets):

Package	Version	Info
@graphql-codegen/cli	3.3.0-alpha-20230403114914-6e6076d6c	npm ↗︎ unpkg ↗︎
@graphql-codegen/visitor-plugin-common	3.1.0-alpha-20230403114914-6e6076d6c	npm ↗︎ unpkg ↗︎
@graphql-codegen/typescript-document-nodes	3.0.3-alpha-20230403114914-6e6076d6c	npm ↗︎ unpkg ↗︎
@graphql-codegen/gql-tag-operations	3.0.0-alpha-20230403114914-6e6076d6c	npm ↗︎ unpkg ↗︎
@graphql-codegen/typescript-operations	3.0.3-alpha-20230403114914-6e6076d6c	npm ↗︎ unpkg ↗︎
@graphql-codegen/typescript-resolvers	3.2.0-alpha-20230403114914-6e6076d6c	npm ↗︎ unpkg ↗︎
@graphql-codegen/typed-document-node	4.0.0-alpha-20230403114914-6e6076d6c	npm ↗︎ unpkg ↗︎
@graphql-codegen/typescript	3.0.3-alpha-20230403114914-6e6076d6c	npm ↗︎ unpkg ↗︎
@graphql-codegen/client-preset	3.0.0-alpha-20230403114914-6e6076d6c	npm ↗︎ unpkg ↗︎
@graphql-codegen/graphql-modules-preset	3.1.2-alpha-20230403114914-6e6076d6c	npm ↗︎ unpkg ↗︎
@graphql-codegen/testing	2.0.2-alpha-20230403114914-6e6076d6c	npm ↗︎ unpkg ↗︎
@graphql-codegen/plugin-helpers	4.2.0-alpha-20230403114914-6e6076d6c	npm ↗︎ unpkg ↗︎

[github-actions]

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