Make procedure mismatch more informative with pragma/call convention mismatches (#18384)

* Added more concise calling convention/pragma mismatch messages
* Now only adds callConvMsg/lock message  when sensible
* Fixed message formatting
* Added tests, and fixed some bugs
* Tests joined, and always indenting
* More tests and more bug fixes
* Fixed first test in tprocmismatch
* Using var param for writting mismatches
* Better logic for handling proc type rel and conv/pragma mismatch
* Refactored getProcConvMismatch
* Fixed callConv message formatting
* Fixed test for proper message
* Cleanup to address issues
* getProcConvMismatch now returns tuple, and reformatted code

tests/errmsgs/tproc_mismatch.nim

@@ -0,0 +1,74 @@
+discard """
+  action: reject
+  cmd: '''nim check --hints:off $options $file'''
+  nimoutFull: true
+  nimout: '''
+tproc_mismatch.nim(35, 52) Error: type mismatch: got <proc (a: int, c: float){.cdecl, noSideEffect, gcsafe, locks: 0.}> but expected 'proc (a: int, c: float){.closure, noSideEffect.}'
+  Calling convention mismatch: got '{.cdecl.}', but expected '{.closure.}'.
+tproc_mismatch.nim(39, 6) Error: type mismatch: got <proc (){.inline, noSideEffect, gcsafe, locks: 0.}>
+but expected one of: 
+proc bar(a: proc ())
+  first type mismatch at position: 1
+  required type for a: proc (){.closure.}
+  but expression 'fn1' is of type: proc (){.inline, noSideEffect, gcsafe, locks: 0.}
+  Calling convention mismatch: got '{.inline.}', but expected '{.closure.}'.
+
+expression: bar(fn1)
+tproc_mismatch.nim(43, 8) Error: type mismatch: got <proc (){.inline, noSideEffect, gcsafe, locks: 0.}> but expected 'proc (){.closure.}'
+  Calling convention mismatch: got '{.inline.}', but expected '{.closure.}'.
+tproc_mismatch.nim(48, 8) Error: type mismatch: got <proc (){.locks: 0.}> but expected 'proc (){.closure, noSideEffect.}'
+  Pragma mismatch: got '{..}', but expected '{.noSideEffect.}'.
+tproc_mismatch.nim(52, 8) Error: type mismatch: got <proc (a: int){.noSideEffect, gcsafe, locks: 0.}> but expected 'proc (a: float){.closure.}'
+tproc_mismatch.nim(61, 9) Error: type mismatch: got <proc (a: int){.locks: 0.}> but expected 'proc (a: int){.closure, gcsafe.}'
+  Pragma mismatch: got '{..}', but expected '{.gcsafe.}'.
+tproc_mismatch.nim(69, 9) Error: type mismatch: got <proc (a: int): int{.nimcall.}> but expected 'proc (a: int): int{.cdecl.}'
+  Calling convention mismatch: got '{.nimcall.}', but expected '{.cdecl.}'.
+tproc_mismatch.nim(70, 9) Error: type mismatch: got <proc (a: int): int{.cdecl.}> but expected 'proc (a: int): int{.nimcall.}'
+  Calling convention mismatch: got '{.cdecl.}', but expected '{.nimcall.}'.
+tproc_mismatch.nim(74, 9) Error: type mismatch: got <proc (a: int){.closure, locks: 3.}> but expected 'proc (a: int){.closure, locks: 1.}'
+  Pragma mismatch: got '{.locks: 3.}', but expected '{.locks: 1.}'.
+lock levels differ
+'''
+"""
+block: # CallConv mismatch
+  func a(a: int, c: float) {.cdecl.} = discard
+  var b: proc(a: int, c: float) {.noSideEffect.} = a
+block: # Parameter CallConv mismatch
+  proc fn1() {.inline.} = discard
+  proc bar(a: proc()) = discard
+  bar(fn1)
+block: # CallConv mismatch
+  proc fn1() {.inline.} = discard
+  var fn: proc()
+  fn = fn1
+block: # Pragma mismatch
+  var a = ""
+  proc fn1() = a.add "b"
+  var fn: proc() {.noSideEffect.}
+  fn = fn1
+block: # Fail match not do to Pragma or CallConv
+  proc fn1(a: int) = discard
+  var fn: proc(a: float)
+  fn = fn1
+block: # Infered noSideEffect assign
+  type Foo = ref object
+    x0: int
+  var g0 = Foo(x0: 1)
+  proc fn1(a: int) = g0.x0 = a
+  var fn2: proc(a: int)
+  var fn3: proc(a: int) {.gcsafe.}
+  fn2 = fn1
+  fn3 = fn1
+block: # Indrection through pragmas
+  {.pragma: inl1, inline.}
+  {.pragma: inl2, inline.}
+  {.pragma: p1, nimcall.}
+  {.pragma: p2, cdecl.}
+  var fn1: proc(a: int): int {.inl1, p1.}
+  var fn2: proc(a: int): int {.inl2, p2.}
+  fn2 = fn1
+  fn1 = fn2
+block: # Lock levels differ
+  var fn1: proc(a: int){.locks: 3.}
+  var fn2: proc(a: int){.locks: 1.}
+  fn2 = fn1