Improve interpreter spec test coverage

Failing spec tests as of November:

test/spec/

• const.wast,
• linking.wast,
• unreached-invalid.wast,
• elem.wast,

test/spec/threads (to be upstreamed into testsuite from the threads repo), ported in #8418.

• atomic.wast
• deeply_nested.wast
• LB_atomic.wast
• LB.wast
• MP_atomic.wast
• MP.wast
• nested.wast
• SB_atomic.wast
• SB.wast
• simple.wast
• thread.wast
• unlinkable.wast
• wait_notify.wast

test/spec/testsuite/

• address.wast, # 64-bit offset allowed by memory64
• array_new_elem.wast, # Failure to parse element segment item abbreviation
• binary.wast, # Missing data count section validation
• call_indirect64.wast, # Failure to parse element segment abbreviation
• comments.wast, # Issue with carriage returns being treated as newlines
• const.wast, # Hex float constant not recognized as out of range
• conversions.wast, # Promoted NaN should be canonical
• data.wast, # Fail to parse data segment offset abbreviation
• elem.wast, # Requires modeling empty declarative segments
• f32.wast, # Adding -0 and -nan should give a canonical NaN
• f64.wast, # Adding -0 and -nan should give a canonical NaN
• float_exprs.wast, # Adding 0 and NaN should give canonical NaN
• float_misc.wast, # Rounding wrong on f64.sqrt
• func.wast, # Duplicate parameter names not properly rejected
• global.wast, # Fail to parse table
• if.wast, # Requires more precise unreachable validation
• imports.wast, # Missing validation of missing function on instantiation
• proposals/threads/imports.wast, # Missing memory type validation on instantiation
• linking.wast, # Missing function type validation on instantiation
• memory.wast, # Requires wast module definition support
• proposals/threads/memory.wast, # Missing memory type validation on instantiation
• memory64-imports.wast, # Missing validation on instantiation
• annotations.wast, # String annotations IDs should be allowed
• id.wast, # Empty IDs should be disallowed
• instance.wast, # Requires wast module definition support
• table64.wast, # Requires wast module definition support
• table_grow.wast, # Incorrect table linking semantics in interpreter
• tag.wast, # Non-empty tag results allowed by stack switching
• try_table.wast, # Requires try_table interpretation
• local_init.wast, # Requires local validation to respect unnamed blocks
• ref_func.wast, # Requires rejecting undeclared functions references
• ref_is_null.wast, # Requires ref.null wast constants
• ref_null.wast, # Requires ref.null wast constants
• return_call_indirect.wast, # Requires more precise unreachable validation
• select.wast, # Requires ref.null wast constants
• table.wast, # Requires support for table default elements
• unreached-invalid.wast, # Requires more precise unreachable validation
• array.wast, # Requires support for table default elements
• br_if.wast, # Requires more precise branch validation
• br_on_cast.wast, # Requires host references to not be externalized i31refs
• br_on_cast_fail.wast, # Requires host references to not be externalized i31refs
• extern.wast, # Requires ref.host wast constants
• i31.wast, # Requires support for table default elements
• ref_cast.wast, # Requires host references to not be externalized i31refs
• ref_test.wast, # Requires host references to not be externalized i31refs
• struct.wast, # Duplicate field names not properly rejected
• type-rec.wast, # Missing function type validation on instantiation
• type-subtyping.wast, # ShellExternalInterface::callTable does not handle subtyping
• call_indirect.wast, # Bug with 64-bit inline element segment parsing
• memory64.wast, # Requires wast module definition support
• imports0.wast, # Missing memory type validation on instantiation
• imports2.wast, # Missing memory type validation on instantiation
• imports3.wast, # Missing memory type validation on instantiation
• linking0.wast, # Missing memory type validation on instantiation
• linking3.wast, # Fatal error on missing table.
• i16x8_relaxed_q15mulr_s.wast, # Requires wast either support
• i32x4_relaxed_trunc.wast, # Requires wast either support
• i8x16_relaxed_swizzle.wast, # Requires wast either support
• relaxed_dot_product.wast, # Requires wast either support
• relaxed_laneselect.wast, # Requires wast either support
• relaxed_madd_nmadd.wast, # Requires wast either support
• relaxed_min_max.wast, # Requires wast either support
• simd_const.wast, # Hex float constant not recognized as out of range
• simd_conversions.wast, # Promoted NaN should be canonical
• simd_f32x4.wast, # Min of 0 and NaN should give a canonical NaN
• simd_f32x4_arith.wast, # Adding inf and -inf should give a canonical NaN
• simd_f32x4_rounding.wast, # Ceil of NaN should give a canonical NaN
• simd_f64x2.wast, # Min of 0 and NaN should give a canonical NaN
• simd_f64x2_arith.wast, # Adding inf and -inf should give a canonical NaN
• simd_f64x2_rounding.wast, # Ceil of NaN should give a canonical NaN
• simd_i32x4_cmp.wast, # UBSan error on integer overflow
• simd_i32x4_arith2.wast, # UBSan error on integer overflow
• simd_i32x4_dot_i16x8.wast, # UBSan error on integer overflow
• token.wast, # Lexer should require spaces between strings and non-paren tokens