fix - Locale selection and prefix

[andreituicu]

Fix locale selection in the JS:

• use the metadata if available. we normally set it in the bulk metadata.xls on all paths
• fix url prefix so blog header and copyright are correctly retrieved.

Test URLs: US (blog header has ServiceNow Research)

• Before: https://main--servicenow--hlxsites.hlx.live/blogs/2023/maximize-efficiency-hyperautomation
• After: https://fix-locale--servicenow--hlxsites.hlx.live/blogs/2023/maximize-efficiency-hyperautomation

UK (blog header has EMEA Insights)

• Before: https://main--servicenow--hlxsites.hlx.live/uk/blogs/2023/uk-i-must-prepare-future-workplace
• After: https://fix-locale--servicenow--hlxsites.hlx.live/uk/blogs/2023/uk-i-must-prepare-future-workplace

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Page	Scores	Audits	Google
/blogs/2023/maximize-efficiency-hyperautomation
/uk/blogs/2023/uk-i-must-prepare-future-workplace