Add new Performance Analyzer metrics and fix table formatting (#5182)

* fixed problem with table and added new metrics

Signed-off-by: Heather Halter <hdhalter@amazon.com>

* fix formatting

Signed-off-by: Heather Halter <hdhalter@amazon.com>

* fixed table formatting

Signed-off-by: Heather Halter <hdhalter@amazon.com>

* Update reference.md

Signed-off-by: Heather Halter <HDHALTER@AMAZON.COM>

* Update reference.md

Signed-off-by: Heather Halter <HDHALTER@AMAZON.COM>

* Update reference.md

Signed-off-by: Heather Halter <HDHALTER@AMAZON.COM>

* Update _monitoring-your-cluster/pa/reference.md

Co-authored-by: Naarcha-AWS <97990722+Naarcha-AWS@users.noreply.github.com>
Signed-off-by: Heather Halter <HDHALTER@AMAZON.COM>

* Update _monitoring-your-cluster/pa/reference.md

Co-authored-by: Naarcha-AWS <97990722+Naarcha-AWS@users.noreply.github.com>
Signed-off-by: Heather Halter <HDHALTER@AMAZON.COM>

* Update _monitoring-your-cluster/pa/reference.md

Co-authored-by: Naarcha-AWS <97990722+Naarcha-AWS@users.noreply.github.com>
Signed-off-by: Heather Halter <HDHALTER@AMAZON.COM>

* Update _monitoring-your-cluster/pa/reference.md

Co-authored-by: Naarcha-AWS <97990722+Naarcha-AWS@users.noreply.github.com>
Signed-off-by: Heather Halter <HDHALTER@AMAZON.COM>

* Update _monitoring-your-cluster/pa/reference.md

Co-authored-by: Naarcha-AWS <97990722+Naarcha-AWS@users.noreply.github.com>
Signed-off-by: Heather Halter <HDHALTER@AMAZON.COM>

* Update _monitoring-your-cluster/pa/reference.md

Co-authored-by: Naarcha-AWS <97990722+Naarcha-AWS@users.noreply.github.com>
Signed-off-by: Heather Halter <HDHALTER@AMAZON.COM>

* Update reference.md

Fixed the intro statement

Signed-off-by: Heather Halter <HDHALTER@AMAZON.COM>

* Apply suggestions from code review

Editorial corrections.

Co-authored-by: Nathan Bower <nbower@amazon.com>
Signed-off-by: Heather Halter <HDHALTER@AMAZON.COM>

* Update reference.md

Added a description under the Dimensions: N/A section and a couple editorial nits.

Signed-off-by: Heather Halter <HDHALTER@AMAZON.COM>

* Update reference.md

Signed-off-by: Heather Halter <HDHALTER@AMAZON.COM>

* Update reference.md

Signed-off-by: Heather Halter <HDHALTER@AMAZON.COM>

* Update reference.md

Signed-off-by: Heather Halter <HDHALTER@AMAZON.COM>

* Update reference.md

Signed-off-by: Heather Halter <HDHALTER@AMAZON.COM>

* Update _monitoring-your-cluster/pa/reference.md

Co-authored-by: Nathan Bower <nbower@amazon.com>
Signed-off-by: Heather Halter <HDHALTER@AMAZON.COM>

* Update reference.md

Removed search backpressure info, as requested; removed info marked with TBD.

Signed-off-by: Heather Halter <HDHALTER@AMAZON.COM>

---------

Signed-off-by: Heather Halter <hdhalter@amazon.com>
Signed-off-by: Heather Halter <HDHALTER@AMAZON.COM>
Co-authored-by: Naarcha-AWS <97990722+Naarcha-AWS@users.noreply.github.com>
Co-authored-by: Nathan Bower <nbower@amazon.com>
Signed-off-by: Melissa Vagi <vagimeli@amazon.com>