Adjust SwANGLE sharding and fix angle_end2end_tests filter.

1. Due to performance improvements we don't need as many shards now.
2. '\*' in filter was needed only on command line, launcher uses just '*'.

TBR=kbr

Bug: angleproject:4426, angleproject:4421
Change-Id: I97b1345cbfa592931f0f3dead05397b9f6b1c029
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2086299Reviewed-by: Yuly Novikov <ynovikov@chromium.org>
Commit-Queue: Yuly Novikov <ynovikov@chromium.org>
Cr-Commit-Position: refs/heads/master@{#746862}

testing/buildbot/test_suites.pyl

@@ -3329,7 +3329,7 @@
           '--test-launcher-retry-limit=0',
         ],
         'swarming': {
-          'shards': 20,
+          'shards': 3,
         },
       },
       'angle_deqp_gles31_tests': {
@@ -3339,7 +3339,7 @@
           '--test-launcher-retry-limit=0',
         ],
         'swarming': {
-          'shards': 6,
+          'shards': 4,
         },
       },
       'angle_deqp_gles3_tests': {
@@ -3349,7 +3349,7 @@
           '--test-launcher-retry-limit=0',
         ],
         'swarming': {
-          'shards': 29,
+          'shards': 9,
         },
       },
       'angle_deqp_khr_gles2_tests': {
@@ -3368,7 +3368,7 @@
       },
       'angle_end2end_tests': {
         'args': [
-          '--gtest_filter=\*Vulkan_SwiftShader',
+          '--gtest_filter=*Vulkan_SwiftShader',
           '--test-launcher-batch-limit=512',
           '--test-launcher-retry-limit=0',
         ],