Change PATH_MAX to JL_PATH_MAX

[2005m]

Linked to #10682 and to avoid warning like the below one (see https://discourse.julialang.org/t/ccall-c-sort-vector-of-string/74635/21):

D:\Code\test>clang++ --std=c++17 -shared -undefined dynamic_lookup -o libsort.dll 
-I C:\Users\gitboy\.julia\artifacts\ddaec29ab3e1def8127a1757203ee4a75c1bbead\include\
-ID:\julia-1.7.1-win64\julia-1.7.1\include\julia
-LD:\julia-1.7.1-win64\julia-1.7.1\lib\julia sort.cpp

In file included from sort.cpp:1:
In file included from C:\Users\gitboy\.julia\artifacts\ddaec29ab3e1def8127a1757203ee4a75c1bbead\include\jlcxx/jlcxx.hpp:13:
In file included from C:\Users\gitboy\.julia\artifacts\ddaec29ab3e1def8127a1757203ee4a75c1bbead\include\jlcxx/julia_headers.hpp:15:
In file included from D:\julia-1.7.1-win64\julia-1.7.1\include\julia\julia.h:12:
In file included from D:\julia-1.7.1-win64\julia-1.7.1\include\julia\julia_fasttls.h:14:
  D:\julia-1.7.1-win64\julia-1.7.1\include\julia/dirpath.h:10:9: warning: 'PATH_MAX' macro
    redefined [-Wmacro-refedined]
  #define PATH_MAX MAX_PATH
          ^
  D:\llvm-mingw-20211002-msvcrt-x86_64\llvm-mingw-20211002-msvcrt-x86_64\include\limits.h:20:9:
      previous definition is here
  #define PATH_MAX   260
          ^
  1 warning generated

[musm]

We should prefix this with JL instead of JULIA to be consistent.

[2005m]

@musm please let me know if you need anything else.

[DilumAluthge]

The CI failures seem to be related to the contents of this PR.

package_win32 (log):

/cygdrive/c/buildbot/worker/package_win32/build/cli/loader_lib.c: In function 'load_library':
/cygdrive/c/buildbot/worker/package_win32/build/cli/loader_lib.c:52:17: error: 'JL_PATH_MAX' undeclared (first use in this function)
   52 |     char path[2*JL_PATH_MAX + 1] = {0};
      |                 ^~~~~~~~~~~
/cygdrive/c/buildbot/worker/package_win32/build/cli/loader_lib.c:52:17: note: each undeclared identifier is reported only once for each function it appears in
/cygdrive/c/buildbot/worker/package_win32/build/cli/loader_lib.c: At top level:
/cygdrive/c/buildbot/worker/package_win32/build/cli/loader_lib.c:101:14: error: 'JL_PATH_MAX' undeclared here (not in a function)
  101 | char lib_dir[JL_PATH_MAX];
      |              ^~~~~~~~~~~
make[1]: *** [Makefile:49: loader_lib.o] Error 1
make: *** [Makefile:79: julia-cli-release] Error 2
make: *** Waiting for unfinished jobs....

package_win64 (log):

/cygdrive/c/buildbot/worker/package_win64/build/cli/loader_lib.c: In function 'load_library':
/cygdrive/c/buildbot/worker/package_win64/build/cli/loader_lib.c:52:17: error: 'JL_PATH_MAX' undeclared (first use in this function)
   52 |     char path[2*JL_PATH_MAX + 1] = {0};
      |                 ^~~~~~~~~~~
/cygdrive/c/buildbot/worker/package_win64/build/cli/loader_lib.c:52:17: note: each undeclared identifier is reported only once for each function it appears in
/cygdrive/c/buildbot/worker/package_win64/build/cli/loader_lib.c: At top level:
/cygdrive/c/buildbot/worker/package_win64/build/cli/loader_lib.c:101:14: error: 'JL_PATH_MAX' undeclared here (not in a function)
  101 | char lib_dir[JL_PATH_MAX];
      |              ^~~~~~~~~~~
make[1]: *** [Makefile:49: loader_lib.o] Error 1
make: *** [Makefile:79: julia-cli-release] Error 2
make: *** Waiting for unfinished jobs....

[2005m]

@DilumAluthge should be fixed for win_32 and win_64. Please let me know if any issue related to this PR. Thank you.