Add pcre-jit for s390x, remove it on some riscv64

[yosifkit]

PHP 8.1+ bundled pcre supports JIT on s390x:

• https://github.com/php/php-src/tree/php-8.1.0/ext/pcre/pcre2lib
• https://github.com/PCRE2Project/pcre2/commits/pcre2-10.37/src/sljit/sljitNativeS390X.c

PHP 8.3+ bundled pcre is new enough for JIT support on riscv64:

• https://github.com/php/php-src/tree/php-8.3.0/ext/pcre/pcre2lib
• https://github.com/PCRE2Project/pcre2/commits/pcre2-10.41/src/sljit/sljitNativeRISCV_64.c