RDKB-67070 : In $_GET Skip empty segments and treat a missing '=' as an empty string value

[pavankumar464]

Reason for change: Webui page with url "mac_ssid=&" and "mac_ssid" shows 500 Internal Server Error
Test Procedure: Test for mac_ssid URL inputs in wireless_network_configuration.jst
Risks: Low
Priority: P1

[Copilot]

Copilot review overview

🟢 Approval recommended

No unresolved blocking issues were identified.

Review effort: Lite
Findings: None

What changed in this PR

Updates $_GET parsing to ignore empty query segments and treat parameters without = as empty strings, preventing 500 errors for inputs such as mac_ssid=& and mac_ssid.

Changes:

• Updated runtime and test-prefix parsing.
• Regenerated parser fixtures.
• Added regression coverage.

File	Description
tests/​parser/​jst_prefix.js	Updated parser test prefix.
tests/​parser/​jst_parser_template_block_string.jst.parsed	Regenerated parser output.
tests/​parser/​jst_parser_template_block_content.jst.parsed	Regenerated parser output.
tests/​parser/​jst_parser_skip_whitespace.jst.parsed	Regenerated parser output.
tests/​parser/​jst_parser_single_quotes.jst.parsed	Regenerated parser output.
tests/​parser/​jst_parser_line_feeds.jst.parsed	Regenerated parser output.
tests/​parser/​jst_parser_include_unknown.jst.parsed	Regenerated parser output.
tests/​parser/​jst_parser_include_runtime.jst.parsed	Regenerated parser output.
tests/​parser/​jst_parser_include_once.jst.parsed	Regenerated parser output.
tests/​parser/​jst_parser_include_not_if_in_line_comment.jst.parsed	Regenerated parser output.
tests/​parser/​jst_parser_include_not_if_in_content.jst.parsed	Regenerated parser output.
tests/​parser/​jst_parser_include_not_if_in_block_comment.jst.parsed	Regenerated parser output.
tests/​parser/​jst_parser_include_nested.jst.parsed	Regenerated parser output.
tests/​parser/​jst_parser_include_malformed_1.jst.parsed	Regenerated parser output.
tests/​parser/​jst_parser_include_code_before.jst.parsed	Regenerated parser output.
tests/​parser/​jst_parser_include_code_after.jst.parsed	Regenerated parser output.
tests/​parser/​jst_parser_comment_tag.jst.parsed	Regenerated parser output.
tests/​parser/​jst_parser_backslash.jst.parsed	Regenerated parser output.
tests/​parser_test.cpp	Added regression tests.
jsts/​jst_prefix.js	Updated runtime $_GET parsing.

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