[lldb] Make module-ownership.mm test more robust against AST node ord…

[Teemperor]

…ering

The current test is checking both the anonymous structs and the template
specializations in one FileCheck run, but the anonymous struct line can
partially match the AST dump of a template specialization, causing that
FileCheck won't match that same line later against the template specialization
check and incorrectly fails on that check. This only happens when the
template specialization node somehow ends up before the anonymous struct node.

This patch just puts the checks for the anonymous structs in their own FileCheck
run to prevent them from partially matching any other record decl.

Fixes rdar://62997926

(cherry picked from commit 710fa2c)

[Teemperor]

@swift-ci test

[Teemperor]

@swift-ci test

I also cherry-picked a fix for the test that make it pass upstream, but weirdly this test passes on the stable branch even without as our lldb-test symbols -dump-clang-ast output has this weird twist in it:

Downstream output:

CXXRecordDecl 0x7fc6030319e8 <<invalid sloc>> <invalid sloc> imported in A.B struct
StructB
CXXRecordDecl 0x7fc6030317c8 <<invalid sloc>> <invalid sloc> imported in A.B <undeserialized declarations> struct definition
|-DefinitionData pass_in_registers aggregate standard_layout trivially_copyable pod trivial literal
| |-DefaultConstructor exists trivial needs_implicit
| |-CopyConstructor simple trivial has_const_param needs_implicit implicit_has_const_param
| |-MoveConstructor exists simple trivial needs_implicit
| |-CopyAssignment trivial has_const_param needs_implicit implicit_has_const_param
| |-MoveAssignment exists simple trivial needs_implicit
| `-Destructor simple irrelevant trivial needs_implicit
`-FieldDecl 0x7fc603031990 <<invalid sloc>> <invalid sloc> imported in A.B anon_field_b 'int'

Upstream output:

StructB
CXXRecordDecl 0x7f96cf8239c8 <<invalid sloc>> <invalid sloc> imported in A.B <undeserialized declarations> struct definition
|-DefinitionData pass_in_registers aggregate standard_layout trivially_copyable pod trivial literal
| |-DefaultConstructor exists trivial needs_implicit
| |-CopyConstructor simple trivial has_const_param needs_implicit implicit_has_const_param
| |-MoveConstructor exists simple trivial needs_implicit
| |-CopyAssignment trivial has_const_param needs_implicit implicit_has_const_param
| |-MoveAssignment exists simple trivial needs_implicit
| `-Destructor simple irrelevant trivial needs_implicit
`-FieldDecl 0x7f96cf823b90 <<invalid sloc>> <invalid sloc> imported in A.B anon_field_b 'int'
(anonymous struct)
CXXRecordDecl 0x7f96cf823be8 <<invalid sloc>> <invalid sloc> imported in A.B struct
AlsoInNamespace<int>

[Teemperor]

@swift-ci test