compiler/sem*: improve lineinfo for qualified and generic procs (#10427)

Previously the compiler will believe these are where `newSeq` symbol
starts:

    newSeq[int]()
          ^
    system.newSeq[int]()
                 ^

This commit moves them back to:

    newSeq[int]()
    ^
    system.newSeq[int]()
           ^

nimsuggest/tests/tgeneric_highlight.nim

@@ -0,0 +1,18 @@
+newSeq[int]()
+system.newSeq[int]()#[!]#
+
+discard """
+disabled:true
+$nimsuggest --tester $file
+>highlight $1
+highlight;;skType;;1;;7;;3
+highlight;;skProc;;1;;0;;6
+highlight;;skProc;;1;;0;;6
+highlight;;skType;;1;;7;;3
+highlight;;skProc;;1;;0;;6
+highlight;;skType;;2;;14;;3
+highlight;;skProc;;2;;7;;6
+highlight;;skProc;;2;;7;;6
+highlight;;skType;;2;;14;;3
+highlight;;skProc;;2;;7;;6
+"""