Support IAT_PVALUE string literals in the interpreter

[kg]

Adds support for IAT_PVALUE string literals and removes INTOP_LDIND_O. This fixes JIT\regression\jitblue\Runtime_100437

[Copilot]

Pull Request Overview

This PR adds support for IAT_PVALUE string literals in the CoreCLR interpreter, enabling proper handling of string references that require indirection. The key enhancement is implementing the INTOP_LDIND_O instruction and updating the string literal compilation logic to handle both direct (IAT_VALUE) and indirect (IAT_PVALUE) string access patterns.

Key changes:

• Implements INTOP_LDIND_O instruction for object indirection in the interpreter execution engine
• Updates string literal compilation to handle IAT_PVALUE access type with proper indirection logic
• Reorganizes instruction generation order to support the new indirection pattern

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
src/coreclr/vm/interpexec.cpp	Adds INTOP_LDIND_O case to interpreter execution switch statement
src/coreclr/interpreter/compiler.cpp	Updates string literal compilation to handle IAT_PVALUE with indirection and reorganizes instruction data assignment

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