CrossReference: Improve test_name filtering

The current implementation supports:

1. Exact match

• Example: spider.auto_increment
• Lookup: test_name__exact

2. Substring match using the special *. notation

• Example: *.sp-error
• Lookup: test_name__icontains
• The * character is stripped before applying the lookup, while the leading `.` remains.

This special "." syntax was designed to support substring lookups only for the portion of the test name that comes after the suite separator "." . In practice, it allows searching with icontains only after the test suite name, instead of supporting more general wildcard-style matching.

For example:

• *.sp-error searches for .sp-error inside test_name

As a result, the current behavior is limited and not intuitive for users who expect more general prefix, suffix, or contains matching.

Proposed changes
Update filters.test_name to support four matching modes:

1. Exact match

• Input: string
• Lookup: test_name__exact

2. Ends with

• Input: *string
• Lookup: test_name__endswith

3. Contains

• Input: *string*
• Lookup: test_name__contains

4. Starts with

• Input: string*
• Lookup: test_name__startswith