test(docs-infra): temporarily disable upgrade systemjs example e2e tests (#43431)
test(docs-infra): temporarily disable upgrade systemjs example e2e tests (#43431)

This commit temporarily disables the SystemJS upgrade e2e tests. All of
the upgrade e2e tests (except for `phonecat-1-typescript`) rely on UMD
bundles. These are no longer available for the v13 Angular package
output, so we disable the tests for now.

These e2e tests can be re-enabled once we migrated the exampels from
UMD bundles to e.g. the CLI, or some custom rollup build. Alternatively
it might be even possible to use FESM bundles directly (depending on
browser support for the AIO examples; this is something the docs-infra
team will have to determine though).

PR Close #43431

manekinekko/angular,JiaLiPassion/angular,manekinekko/angular,ocombe/angular,ocombe/angular,JiaLiPassion/angular,shairez/angular,brandonroberts/angular,manekinekko/angular,angular/angular,angular-indonesia/angular,brandonroberts/angular,gkalpak/angular,ocombe/angular,angular-indonesia/angular,brandonroberts/angular,angular/angular,shairez/angular,gkalpak/angular,shairez/angular,ocombe/angular,gkalpak/angular,gkalpak/angular,gnomeontherun/angular,brandonroberts/angular,manekinekko/angular,shairez/angular,shairez/angular,angular-indonesia/angular,angular/angular,angular-indonesia/angular,gnomeontherun/angular,ocombe/angular,JiaLiPassion/angular,JiaLiPassion/angular,brandonroberts/angular,angular/angular,gnomeontherun/angular,gnomeontherun/angular,manekinekko/angular,manekinekko/angular,ocombe/angular,brandonroberts/angular