More test suite strictness fixups

[DanielRosenwasser]

This is a small set of fixes for what's mainly noImplicitThis and strictPropertyInitialization. I didn't change everything - I think we should actually just deal with most of the noImplicitThis errors.

Part of #62333.

[Copilot]

Pull request overview

This PR addresses test suite compatibility with stricter TypeScript compiler settings, specifically targeting noImplicitThis and strictPropertyInitialization errors. The changes ensure that test cases can run under stricter mode defaults while still testing the intended behaviors.

Changes:

• Modified two fourslash tests to avoid strictPropertyInitialization issues by changing class patterns to interfaces or constructors
• Added @strict: false or @noImplicitThis: false directives to 11 compiler test files that intentionally test non-strict behaviors
• Added @strictPropertyInitialization: false to a test that needs uninitialized class properties

Reviewed changes

Copilot reviewed 16 out of 16 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
fixExactOptionalUnassignableProperties12.ts	Changed from class with instantiation to interface with declare to avoid property initialization requirements
fixExactOptionalUnassignableProperties11.ts	Changed property assignment from method to constructor to satisfy property initialization rules
parserModifierOnStatementInBlock1.ts	Added @strict: false to allow this in global scope
interfaceExtendsObjectIntersectionErrors.ts	Added @strictPropertyInitialization: false to allow uninitialized properties in test classes
noParameterReassignmentJSIIFE.ts	Added @noImplicitThis: false for test using this in function
lambdaPropSelf.ts	Added @strict: false for test using this in various contexts
declarationEmitPromise.ts	Added @noImplicitThis: false for test using this with apply
collisionThisExpressionAndVarInGlobal.ts	Added @strict: false for collision test with global this
collisionThisExpressionAndModuleInGlobal.ts	Added @strict: false for collision test with global this
collisionThisExpressionAndFunctionInGlobal.ts	Added @strict: false for collision test with global this
collisionThisExpressionAndEnumInGlobal.ts	Added @strict: false for collision test with global this
collisionThisExpressionAndClassInGlobal.ts	Added @strict: false for collision test with global this
collisionThisExpressionAndAmbientVarInGlobal.ts	Added @strict: false for collision test with global this
collisionThisExpressionAndAmbientClassInGlobal.ts	Added @strict: false for collision test with global this
collisionThisExpressionAndAliasInGlobal.ts	Added @strict: false for collision test with global this
blockScopedBindingCaptureThisInFunction.ts	Added @strict: false for test capturing this in function