acc: unset all SDK v0.141.0 AI-agent env vars before tests (#5436)

The SDK checks 15 explicit env vars and two generic fallbacks (AGENT,
AI_AGENT) to detect AI coding agents and add agent/<name> to the
User-Agent. The previous list covered only 7 of them, so tests run
inside agents like Augment, Copilot, Goose, Kiro, OpenClaw, VS Code
agent, or Windsurf would still pick up the host agent and produce
non-deterministic output.

Add the missing 10 vars and a comment pointing at listKnownAgents() in
the SDK so the list is easy to keep in sync on future SDK bumps.

Co-authored-by: Isaac

Author: denik

acceptance/acceptance_test.go

@@ -202,14 +202,27 @@ func testAccept(t *testing.T, inprocessMode bool, singleTest string) int {
 	// pick up the host's agent. Setting these to "" via test.toml is not
 	// enough: the SDK (since v0.132.0) treats empty values as a truthy
 	// signal because os.LookupEnv reports them as present.
+	// Keep this list in sync with listKnownAgents() in
+	// github.com/databricks/databricks-sdk-go/useragent/agent.go
+	// plus the AGENT and AI_AGENT generic fallbacks.
 	for _, v := range []string{
+		"AGENT",
+		"AI_AGENT",
+		"AMP_CURRENT_THREAD_ID",
 		"ANTIGRAVITY_AGENT",
+		"AUGMENT_AGENT",
 		"CLAUDECODE",
 		"CLINE_ACTIVE",
 		"CODEX_CI",
+		"COPILOT_CLI",
 		"CURSOR_AGENT",
 		"GEMINI_CLI",
+		"GOOSE_TERMINAL",
+		"KIRO",
+		"OPENCLAW_SHELL",
 		"OPENCODE",
+		"VSCODE_AGENT",
+		"WINDSURF_AGENT",
 	} {
 		os.Unsetenv(v) //nolint:usetesting // t.Setenv cannot unset
 	}