When extended-const is enabled, non-TLS global relocations are handled
via extended constant expressions. However, TLS GOT entries still
require runtime relocation code in `__wasm_apply_global_tls_relocs`
because TLS global addresses depend on `__tls_base`.
Allow `GlobalSection::generateRelocationCode` to be called when `TLS` is
true even if `ctx.arg.extendedConst` is set.
(cherry picked from commit 82ea231835eb238ee38ee379574eea02465d325b)