Remove the need for core/std patches

[bjorn3]

• 0001-Disable-stdsimd.patch (8c2577c removed patch, but doesn't fix stdsimd) (assumes llvm intrinsics, https://github.com/bjorn3/rustc_codegen_cranelift/issues/171)
• 0002-Disable-u128-and-i128-in-libcore.patch (blocked on i128 support bytecodealliance/cranelift#354) (mostly removed in 57feadc by letting u128 and i128 taking or returning function trap, more removed in 8506784)
• 0003-Disable-inline-assembly-in-hint-spin_loop.patch (inline assembly, should probably become an intrinsic) (1e07410)
• 0006-alloc-Disable-some-unsupported-stuff.patch (blocked on i128 support bytecodealliance/cranelift#354) (e09ae25)
• 0009-Workaround-missing-saturating_sub-intrinsic-impl.patch (blocked on Implement a subset of all intrinsics #1) (???)
• 0011-Workaround-for-libstd-crash.patch (05307af)
• 0013-Patch-away-bswap-usage.patch (blocked on Implement a subset of all intrinsics #1) (db5ffde)
• 0014-Don-t-use-OS-TLS.patch (05307af)
• 0015-Remove-usage-of-unsized-locals.patch (blocked on Unsized locals #15) (dcc86d3)
• 0016-Disable-cpuid-intrinsic.patch (blocked on implementing x86 intrinsic cpuid) (Emulate cpuid #1070)
• 0017-Fix-libtest-compilation.patch (blocked on Unsized locals #15) (dcc86d3 and c5b5b2b)
• 0018-test-Force-single-thread-mode.patch (blocked on Support multithreading #388)
• 0022-core-Disable-not-compiling-tests.patch (blocked on Fix libcore tests #806)
• 0023-core-Ignore-failing-tests.patch (blocked on Fix libcore tests #806)
• 0024-libstd-Revert-arg-initialization-on-linux-to-not-req.patch (blocked on implementing #[link_section]) (5c6bf83)
• 0025-Remove-usage-of-extern_weak-in-thread_local_dtor.patch (Fix weak linkage #1074)

[bjorn3]

The only remaining patches are for tests in libcore.