Fix Cardinality for Whitespaces in Query Grammar (#437)

* Use partials for bnf

Before the bnf grammar was in an .adoc file.
In this commit we place it in .bnf file in partials
similar as in aas-specs-security repo.

* Small fix

* Add missing $ for ends-with

Fixes #435

* Set brackets mandatory for items in iterables

Fixes #433

* Remove redundancy in `stringComparison`

Fixes #434

* undo changes in stringComparison clause

* correct cardinality for whitespaces in the query grammar

---------

Co-authored-by: zrgt <garmaev@gmx.de>

Author: sebbader-sap

documentation/IDTA-01002-3/modules/ROOT/partials/bnf/grammar.bnf

@@ -210,5 +210,5 @@
 <SpecificAssetIdsClause> ::=  ( "specificAssetIds" ( "[" ( [0-9]* ) "]" ) ( ".name" | ".value" | ".externalSubjectId" | ".externalSubjectId." <ReferenceClause> ) )
 <idShortPath> ::= ( <idShort> ("[" ( [0-9]* ) "]" )? ( "." <idShortPath> )* )
 <idShort> ::= ( ( [a-z] | [A-Z] ) ( [a-z] | [A-Z] | [0-9] | "_" )* )
- 
-<ws> ::= ( " " | "\t" | "\r" | "\n" )*
+
+<ws> ::= ( " " | "\t" | "\r" | "\n" )+