[ES-6491] Accept GTM-evaluated ProductID variable for integration

[wjlee-visenze]

Added fix(es):

• always call GTM's setInWindow function with overrideExisting as true, so that Recommendations Widgets can load properly on separate PDP page

[devops-guard[bot]]

Jira Ticket Check

Found the corresponding Jira issues: [ES-6491] [gtm] able to accept google tag variable as product ID for integration

[devops-guard[bot]]

Sensitive Data Scan

This PR doesn't seem to contain any sensitive data.