nodes fetch from external api unit tests

[cfaur09]

Reasoning

• no testcase implemented for the case when isNodesFetchFeatureEnabled is false

Proposed Changes

• create new unit test for the getAllNodes when isNodesFetchFeatureEnabled is false
• adjust also the unit test for the getAllNodes when isNodesFetchFeatureEnabled is true

How to test

• npm run test nodes.spec.ts

[github-actions]

k6 load testing comparison.
Base Commit Hash: cce46d1
Target Commit Hash: 92629c7

Metric	Base				Target				Diff
	Avg	Max	90	95	Avg	Max	90	95	Avg	Max	90	95
Nodes	50.21	1026.79	54.14	62.00	50.40	1119.46	53.97	60.56	+0.38% 🔴	+9.02% 🔴	-0.31% ✅	-2.32% ✅
Tokens	50.07	817.85	54.19	62.35	49.46	287.03	53.97	61.08	-1.22% ✅	-64.90% ✅	-0.41% ✅	-2.03% ✅
Pool	49.88	544.36	54.39	62.13	50.16	876.05	54.00	60.99	+0.56% 🔴	+60.93% 🔴	-0.72% ✅	-1.84% ✅
Transactions	62.22	1005.27	57.07	67.69	61.53	1018.95	55.76	66.58	-1.10% ✅	+1.36% 🔴	-2.31% ✅	-1.65% ✅
Mex	49.28	215.24	54.55	61.45	49.87	622.47	53.97	60.93	+1.20% 🔴	+189.20% 🔴	-1.07% ✅	-0.85% ✅
Blocks	56.07	1381.46	55.25	66.17	55.69	1578.96	54.47	62.88	-0.69% ✅	+14.30% 🔴	-1.42% ✅	-4.98% ✅
Accounts	49.53	236.75	54.17	62.19	49.85	584.50	54.00	61.13	+0.64% 🔴	+146.88% 🔴	-0.31% ✅	-1.71% ✅
Test Run Duration	60007.66				60003.19

Legend: Avg - Average Response Time, Max - Maximum Response Time, 90 - 90th Percentile, 95 - 95th Percentile
All times are in milliseconds.