solana_rbpf v0.7.0

• #508: Fix - mmap fd should be -1 when creating anonymous mappings
• #507: Fix - BuiltinProgram::fmt()
• #506: Tests - For BuiltinProgram::eq()
• #505: Fix - Adds error message in case std::alloc::alloc() fails
• #504: Fix - Missing Eq for BuiltinProgram
• #503: Refactor - Split target specific dependencies in Cargo.toml
• #501: Tests - For the deprecated SBPFv1-only instructions
• #500: Refactor - Remove generic parameter Verifier from Executable
• #494: Refactor - emit_product_quotient_remainder() in JIT
• #499: Minor Fixes
• #496: Refactor - lduw to hor64
• #495: Cleanup - Removes unused instruction encodings
• #493: Refactor - Disables little-endian byte swap instructions in SBPFv2
• #492: Refactor - Moves runtime_environment_key out of Config into a static variable
• #491: Fix - callx encoding
• #490: Feature - JIT code emitter stage for aarch64
• #489: Feature - Swaps parameters of sub reg, imm and removes neg
• #488: Refactor - Replaces sub r11, imm with add r11, -imm
• #487: Fix - unused mut in MemoryRegion constructors
• #486: Feature - lduw (load upper word immediate)
• #484: Refactor - FunctionRegistry
• #485: Tests - Rewrite of C ELF tests to Rust or ASM
• #483: Refactor - fixup_relative_calls()
• #481: Feature - Restrict rodata layout in SBPFv2
• #479: Fix - ELF tests a bit
• #478: ELF - error out if sbpf_version.enable_elf_vaddr() and config.optimize_rodata=false