[quoteservice] manual metrics, logs export

[brettmc]

Changes

• add a manual metric to the php quote service
• randomize per-item cost to add some variability to quotes
• bump dependencies to latest
• fix a monolog deprecation
• ensure logs are exported per the configured delay

Merge Requirements

For new features contributions please make sure you have completed the following
essential items:

• CHANGELOG.md updated to document new feature additions
• Appropriate documentation updates in the docs
• Appropriate Helm chart updates in the helm-charts

Maintainers will not merge until the above have been completed. If you're unsure
which docs need to be changed ping the
@open-telemetry/demo-approvers.

[brettmc]

Related to open-telemetry/opentelemetry.io#2669

[puckpuck]

I pushed a fix to your branch for the quote service CI trace-based test. Since the returned cost is now randomized, the quote cost check needed to reflect this.

[brettmc]

Since the returned cost is now randomized

Thanks, I didn't consider if there might be downstream effects of randomizing the cost.