feat(DTFS2-7395): convert tfm mock gef facilities to functions

[MarRobSoftwire]

Introduction :pencil2:

TFM e2e tests used almost identical mock facilities to GEF e2e tests. These are commonised & replaced with functional counterparts

Resolution :heavy_check_mark:

• Move e2e-test/gef mock facilities to the root fixture folder
• Replace tfm mock-gef-facilities import with these commonised functions

[sonarcloud[bot]]

Quality Gate passed

Issues
1 New issue
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
1.4% Duplication on New Code

See analysis details on SonarCloud