Bug 1205300 - Fix reporting documentation links

[loganrosen]

Bug 1205300 reports that Related documentation links on reporting pages and errors point to the removed reporting.html page.

This updates every reporting and charting documentation reference to using/reports-and-charts.html, preserving the relevant report, chart, and data-set anchors. Covering the report forms, generated output, chart pages, and related error messages prevents adjacent paths from retaining the same broken link.

Bug: https://bugzilla.mozilla.org/show_bug.cgi?id=1205300

Test: docker compose -f docker-compose.test.yml run --rm --no-deps bmo.test test_sanity t/004template.t

[Copilot]

Pull request overview

Updates obsolete reporting documentation links to the current reports-and-charts guide.

Changes:

• Redirects report and chart pages to valid documentation sections.
• Updates related error-message documentation links.
• Preserves report, chart, and data-set anchors.

Show a summary per file

File	Description
template/en/default/search/search-report-table.html.tmpl	Updates table-report help link.
template/en/default/search/search-report-graph.html.tmpl	Updates graphical-report help link.
template/en/default/search/search-create-series.html.tmpl	Updates data-set creation help link.
template/en/default/reports/old-charts.html.tmpl	Updates chart help link.
template/en/default/reports/menu.html.tmpl	Updates reporting overview link.
template/en/default/global/user-error.html.tmpl	Updates reporting-related error links.
report.cgi	Updates generated-report documentation link.
chart.cgi	Updates chart documentation link.

Review details

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• Files reviewed: 8/8 changed files
• Comments generated: 0
• Review effort level: Balanced

[dklawren]

LGTM r=dkl