fix: correctly parse preprocessor token pasting and stringification

[144026]

Code snippet comes from: https://github.com/torvalds/linux/blob/v6.18/arch/x86/include/asm/syscall_wrapper.h#L223

Before fix: Notice that __se_sys is incorrectly parsed as a type, #name incorrectly parsed as a preprocessor directive, while in fact they are semantically a single "pasted" identifier token, acting as a function name.

After fix: token pasting is corretly parsed and highlighted.

Parser generation and tests all work corretly.

$ make TS=./tree-sitter-linux-x64-abi15
./tree-sitter-linux-x64-abi15 generate src/grammar.json
cc -Isrc -std=c11 -fPIC   -c -o src/parser.o src/parser.c
ar -rv libtree-sitter-c.a src/parser.o
r - src/parser.o
cc  -shared -Wl,-soname,libtree-sitter-c.so.15.0 src/parser.o  -o libtree-sitter-c.so

$ make TS=./tree-sitter-linux-x64-abi15 test
./tree-sitter-linux-x64-abi15 test
  ambiguities:
      1. ✓ pointer declarations vs expressions
      2. ✓ casts vs multiplications
      3. ✓ function-like type macros vs function calls
      4. ✓ function calls vs parenthesized declarators vs macro types
      5. ✓ Call expressions vs empty declarations w/ macros as types
      6. ✓ Comments after for loops with ambiguities
      7. ✓ Top-level macro invocations
  crlf:
      8. ✓ Line comments with escaped CRLF line endings
  declarations:
      9. ✓ Struct declarations
     10. ✓ Union declarations
     11. ✓ Enum declarations
     12. ✓ Struct declarations containing preprocessor directives
     13. ✓ Primitive-typed variable declarations
     14. ✓ Variable storage classes
     15. ✓ Composite-typed variable declarations
     16. ✓ Pointer variable declarations
     17. ✓ Typedefs
     18. ✓ Function declarations
     19. ✓ Function definitions
     20. ✓ Function specifiers after types
     21. ✓ Function definitions with macro attributes
     22. ✓ Linkage specifications
     23. ✓ Type qualifiers
     24. ✓ Local array declarations
     25. ✓ Attributes
     26. ✓ More Assembly
     27. ✓ Static in Array Declarations
  expressions:
     28. ✓ Number literals
     29. ✓ Identifiers
     30. ✓ Unicode Identifiers
     31. ✓ Common constants
     32. ✓ Function calls
     33. ✓ GNU inline assembly
     34. ✓ Function call with compound statement
     35. ✓ String literals
     36. ✓ Character literals
     37. ✓ Field access
     38. ✓ Boolean operators
     39. ✓ Math operators
     40. ✓ The comma operator
     41. ✓ Assignments
     42. ✓ Pointer operations
     43. ✓ Type-casts
     44. ✓ Sizeof expressions
     45. ✓ Alignof expressions
     46. ✓ Offsetof expressions
     47. ✓ Compound literals
     48. ✓ Compound literals with trailing commas
     49. ✓ Comments with escaped newlines
     50. ✓ Comments with escaped chars and newlines
     51. ✓ Generic Expressions
     52. ✓ Noreturn Type Qualifier
     53. ✓ Restrict Type Qualifier
     54. ✓ Ternary
     55. ✓ Concatenated strings
     56. ✓ Nonnull Type Qualifier
     57. ✓ Top Level Empty Expression Statement
     58. ✓ Sized Type Specifier With Type Qualifiers
  microsoft:
     59. ✓ declaration specs
     60. ✓ pointers
     61. ✓ call modifiers
     62. ✓ SEH exception handling
  preprocessor:
     63. ✓ Include directives
     64. ✓ Object-like macro definitions
     65. ✓ Function-like macro definitions
     66. ✓ Ifdefs
     67. ✓ Elifdefs
     68. ✓ Mixing #elif and #elifdef
     69. ✓ General if blocks
     70. ✓ Preprocessor conditionals in functions
     71. ✓ Preprocessor conditionals in struct/union bodies
     72. ✓ Unknown preprocessor directives
     73. ✓ Preprocessor expressions
  statements:
     74. ✓ If statements
     75. ✓ For loops
     76. ✓ While loops
     77. ✓ Labeled statements
     78. ✓ Switch statements
     79. ✓ Case statements separate from switch statements
     80. ✓ Return statements
     81. ✓ Comments with asterisks
     82. ✓ Comment with multiple backslashes
     83. ✓ Attributes
  types:
     84. ✓ Primitive types
     85. ✓ Type modifiers

Total parses: 85; successful parses: 85; failed parses: 0; success percentage: 100.00%; average speed: 3067 bytes/ms

syntax highlighting:
    ✓ names.c (20 assertions)
    ✓ keywords.c (3 assertions)