Update PlSqlParser.g4 (#4347) #5296

Job	Run time
static-check (ubuntu-latest, useless-parens)	39s
setup	20s
static-check (ubuntu-latest, format)	34s
static-check (ubuntu-latest, ambiguity)	47s
build-pwsh (macos-latest, CSharp)	3m 49s
build-pwsh (macos-latest, Java)	2m 30s
build-pwsh (macos-latest, JavaScript)	2m 52s
build-pwsh (macos-latest, Python3)	2m 53s
build-pwsh (windows-latest, CSharp)	7m 5s
build-pwsh (windows-latest, Java)	5m 14s
build-pwsh (windows-latest, JavaScript)	2m 54s
build-pwsh (windows-latest, Python3)	3m 16s
build-pwsh (ubuntu-latest, CSharp)	5m 39s
build-pwsh (ubuntu-latest, Java)	3m 57s
build-pwsh (ubuntu-latest, JavaScript)	1m 0s
build-pwsh (ubuntu-latest, Python3)	1m 24s
	44m 53s

Provide feedback