Make Sentry error embed form Strict CSP compliant

[fliespl]

Problem Statement

Due to the usage of inline style inside var template, strict csp fails with inline style issue.

Refused to apply inline style because it violates the following Content Security Policy directive: "style-src 'self' data: https:". Either the 'unsafe-inline' keyword, a hash ('sha256-zMSqd3IdI0P85bMS1pHPulcrWrNFUbioxKEvO08Bg9I='), or a nonce ('nonce-...') is required to enable inline execution. Note that hashes do not apply to event handlers, style attributes and javascript: navigations unless the 'unsafe-hashes' keyword is present.

CSP must not include "unsafe-inline" style tags to reproduce problem.

Solution Brainstorm

Extract <style> tag into seperate css file, which would outcome the issue.

[getsentry-release]

Routing to @getsentry/team-web-sdk-frontend for triage. ⏲️

[lforst]

Hi! Thanks for the suggestion! :)

Backlogging this. PRs are always welcome!